B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
3%
3% -- positive reply rate for Combined Apollo + Clay outbound stack, B2B cold outreach campaigns (2026 (18-month audit window ending 2026))
Across 50 client campaigns audited over 18 months, a combined Apollo and Clay stack achieved a positive reply rate of 3% to 8%.
- Data is based on an internal audit of 50 client campaigns by agency Built For B2B
- Presented as a range (3% to 8%) rather than a single point estimate
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
3%
Unit
Percentage
Data Vintage
2026 (18-month audit window ending 2026)
Entity
Sample Size
50
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Built For B2B
Primary
Tier B
https://www.builtforb2b.com/blog/clay-ai-vs-apollo-ai-which-builds-better-b2b-lists ↗
Source Article
Clay AI vs Apollo AI: Which Builds Better B2B Lists in 2026?
Clay AI vs Apollo AI: Which Builds Better B2B Lists in 2026?
Clay AI vs Apollo AI is the wrong question. They solve different problems. The practitioner's guide to when to use each and how to combine them.
7 Min Read
Clay AI vs Apollo AI is the wrong way to frame the choice
Both vendors pitch themse…
Original Research
Built For B2B
· Original study ↗
Methodology
Midpoint of reported range 3-8%; based on Built For B2B's audit of 50 client campaigns over the last 18 months as of the 2026 article; self-reported first-party agency data
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Combined Apollo + Clay outbound stack, B2B cold outreach campaigns: 3% positive reply rate. Source: Built For B2B (2026 (18-month audit window ending 2026)). Via Lighthouse Intelligence -- https://lighthousedata.io/data/apollo-clay-combined-stack-reply-rate
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<blockquote cite="https://lighthousedata.io/data/apollo-clay-combined-stack-reply-rate" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>3%</strong> -- positive reply rate for Combined Apollo + Clay outbound stack, B2B cold outreach campaigns<br><small>Source: Built For B2B (2026 (18-month audit window ending 2026)) · <a href="https://lighthousedata.io/data/apollo-clay-combined-stack-reply-rate" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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